Metamath Proof Explorer


Theorem wl-luk-imim1i

Description: Inference adding common consequents in an implication, thereby interchanging the original antecedent and consequent. Copy of imim1i with a different proof. (Contributed by Wolf Lammen, 17-Dec-2018)

Ref Expression
Hypothesis wl-luk-imim1i.1 φψ
Assertion wl-luk-imim1i ψχφχ

Proof

Step Hyp Ref Expression
1 wl-luk-imim1i.1 φψ
2 ax-luk1 φψψχφχ
3 1 2 ax-mp ψχφχ